Isis’s basic attacks scale on Magical Power. There is no critical strike chance or lifesteal on her auto-attack, regardless of items purchased.

Isis’ basic attacks also deal 30 magical damage plus 25% of her magical power, and utilize a three-swing chain, with the final hit having increased swing time and damage in a small AoE. Basic Attack Progression: 1/1/1.5x damage and swing time.

Isis sends forth a ball of spirit energy. As the ball travels, it gains in power up to 1.5x at max range. At any time, Isis can activate the ability to detonate the ball, dealing magical damage and stunning enemies within 10 ft., scaling in duration up to 1.5x at max range: Damage: 70/110/150/190/230 (+70% of your magical power). Stun: 1s. Cost: 70/80/90/100/110. Cooldown: 12s.

Isis plants her staff into the ground at her target location. Allies within its radius take 30% less damage from all sources. All damage mitigated in this way charges up the staff. When Isis activates the staff, it explodes, dealing damage to all enemies nearby and healing all allies based on how much damage was stored. Damage: 160/200/240/280/320 (+50% of your magical power). Healing: 80/100/120/140/160 (+25% of your magical power). Damage Reduction: 30%. Max Charge: 800/1600/2400/3200/4000. Max Charge Dmg/Heal Scale: 1.5/2/2.5/3/3.5x. Cost: 80/90/100/110/120. Cooldown: 60s.